Loud-speaker-diaphragm mounting



June 24, 1930. J. B. DEANE 1,766,014

LOUD SPEAKER DLAPHRAGM MOUNTING Filed Jan. 1'7, 192 8 UNITED STATES PATENT oFFlcE JOHN BRADLEY DEANE, OLE BROOKLYN, NEW YORK LOUD-SPEAKER-DIAPHRAGM MOUNTING Application filed January 17, 1928.

My invention relates to improvements in loud speaker diaphragm mountings and the object of the invention is to devise an mproved mounting for the diaphragm which will improve the toneof the loud speaker.

A further object is to construct a mounting for the above purpose which will be exceedingly simple and yet which will effectively supportthe diaphragm.

With these and other objects in view which will hereinafter appear my invention consists of a device constructed and arranged all as hereinafter more particularly described and illustrated in the accompanying drawing in which Fig. 1 represents an elevational view of a loud speaker diaphragm showing the same applied to my mounting.

Fig. 2 is a vertical cross section through 2 the line 22 Figure 1.

Figure 3 is an elevational view of my diaphragm flat, ring shaped, supporting sound board drawn to a reduced scale, and

Fig. 4 is a similar view to Figure 3 showing a modified form of mounting applicable where a plurality of diaphragm is used.

Like characters of reference indicate corresponding parts in the different views.

1 designates afiat, ring shaped sound board which is free from any supporting contact at its outer periphery and on both faces, said sound board being supported in position from a central member 2 connected to an inside edge portion of the sound board 1 by means of the slender arm 3. The sound b oard, arm and member 2 are preferably constructed integrally. 1 is a suitable bracket secured to the central member 2 by means of which it can be suitably supported on a pedestal, in a cabinet or upon any other suitable support.

The central member 2 also carr ies the reproducer unit 5 which includes the usual rod or stylus 6 connected to the diaphragm 7 in the usual manner.

' The peripheral edge ofthe diaphragm 7 engages a face of the sound board 1 and is supported thereon by means of the studs 8 which protrude outwardly from saidface as Serial No. 247,409.

is clearly shown in Figures 1 and 2 of the drawing.

As illustrated the diaphragm 7 is a cone but any other form of diaphragm can be used in lieu thereof. 4 i

In the modified form of construction illustrated in Figure 1 instead of a single sound board 1 being employed three sound boards 1, 11 and 111 are shown, all preferably formed integrally with each other and with the arm 3 and central member 2. This particular construction of mounting would be susceptible for use in the. case of a loud speaker which employs a plurality of diaphragm, as in that shown in mycopending application Serial Number 192,108, filed May 17th, 1927.

It will be understood that the same number of sound boards are provided as there I, are diaphragms and the diaphragms will be supported on each sound board in exactly the same manner as described above in the case of the diaphragm 7 and sound board 1.

In constructing a diaphragmmounting as described above the outer periphery of the sound board 1 is entirely free of any supporting contact as are both faces of the sound board. In this construction thesound board supporting the diaphragm is held in position by the single arm 3 which extends from a central member to the inside edge of the sound board. Consequently the tone of the instrument is greatly improved and is entirely free from extraneous sound waves set up by the instrument during its operation.

As many modifications may be made in the invention without departing from the spirit of the same or the scope of the claims the form shown in the accompanying drawing and described in the specification is to be construed in an illustrative and not in a limiting sense.

\Vhat I claim as my invention is- I 1. In aloud speaker flat ring shaped diaphragm mounting, a diaphragm supporting sound board, means extending from the vicinity of the center of the sound board. to its inside edge for supporting it in position,

I. a reproducer unit carried on the sound board supporting means, supporting means for the member, a diaphragm having its ripheral edge engagin a face of the sound oard, but being free attachment thereto.

2. A-diaphragm mounting for loud speakers comprising a flat ring shaped diaphragm supporting sound board and an integral arm extendin inwardly from the inner edge of the soun board, said arm serving as a 10 means for mounting the sound board so as to leave the upper and lower faces and the outer periphery of the sound board unrestrained.

3. A diaphragm mounting for loud speakers comprising a fiat ring shaped diaphragm supporting sound board, a member positioned centrall of said board and contained in the same .p ane, an arm connectin said member to the inner edge of the soundmard and cooperating with said membe to P ovide means for supportingthe sound board in such manner as to leave the upper and lower faces and the outer peri hery. of the sound unrestrained and free e supportin N contact and means for supporting sai f h f 10 d k 4. iap ragm mounting or .u spea ers compri ing a flat ring shaped diaphr gm supportingsound board, means for supportmg said sound board 80 as to leavethe upper and lower faces and the outer v of thfi sound boa'd unrestralilned an 'free 0 vi rate, and a iaphmgm aving its eral edge directl. engaging a faoe si the sound board but of attachment thereto.

5. A diaphragm mounting for loud speak ers comprising a flat rin shaped diaphragm supporting sound boar sound board supporting means connected to the inner edge of the sound board in such manner as to leave the upper and'lower faces and the outer peripheral edge of the sound board unrestrained, a diaphragm having its peripheral ed e directly engaging a face of 4.). the sound oal-d but free of attachment thereto and a stud otruding from the said face of the sound oard and'alfording an abutment a ainst which the peripheral edge of the diaphragm rests. r

to In testimon whereof'I aflix m ture.

J HN BRADLEY NE. 

